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UNVENTED (VENT-FREE)
NATURAL GAS LOG HEATER
ALSO DESIGN-CERTIFIED AS A VENTED DECORATIVE APPLIANCE
OWNER’S OPERATION AND INSTALLATION MANUAL
Heat Majic™
Models FVF18N,
FVF24N, and
FVF30N
Patent Pending
18", 24" and 30" Variable
Manually-Controlled Models
WARNING: Improper installation, adjust-
WARNING: If the information in this
ment, alteration, service, or maintenance
manual is not followed exactly, a fire or
can cause injury or property damage.
explosion may result causing property
Refer to t
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UNVENTED NATURAL GAS LOG HEATER 3. This heater shall not be installed in a SAFETY WARNING: Do not use a bedroom or bathroom unless installed blower insert, heat exchanger INFORMATION as a vented appliance (see Installing insert or other accessory not ap- Damper Clamp Accessory for Vented proved for use with this heater. Operation, page 10). WARNINGS WARNING ICON G 001 4. Never install the heater Due to high temperatures, the IMPORTANT: Read this owner’s • in a recreational vehicle appliance sh
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OWNER’S MANUAL spect the room heater and to replace any SAFETY PRODUCT part of the control system and any gas INFORMATION control which has been under water. FEATURES Continued 14. Do not operate heater if any log is bro- OPERATION ken. Do not operate heater if a log is 11. Do not run heater chipped (dime-sized or larger). This heater is clean burning. It requires no • where flammable liquids or vapors outside venting. There is no heat loss out a 15. Turn heater off and let cool before ser- are
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UNVENTED NATURAL GAS LOG HEATER Confined and Unconfined Space PROVIDING ADEQUATE AIR FOR VENTILATION The National Fuel Gas Code ANSI Z223.1/ COMBUSTION AND NFPA 54 defines a confined space as a The following are excerpts from Na- VENTILATION space whose volume is less than 50 cubic tional Fuel Gas Code, ANSI Z223.1/ 3 feet per 1,000 Btu per hour (4.8 m per kw) NFPA 54, Section 5.3, Air for Combus- of the aggregate input rating of all appli- tion and Ventilation. WARNING: This heater shall ances
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OWNER’S MANUAL AIR FOR COMBUSTION AND VENTILATION Continued DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION Determining if You Have a Confined or Unconfined Space Use this work sheet to determine if you have a confined or unconfined space. Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms. 1. Determine the volume of the space (length x width x height). Length x Width x Height = _________________cu.
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UNVENTED NATURAL GAS LOG HEATER AIR FOR 12" COMBUSTION AND VENTILATION Ventilation Continued Ventilation Grills Grills Into Adjoining Room, Into Adjoining VENTILATION AIR Or Option 2 Room, Remove Ventilation Air From Inside Option 1 Door into Building Adjoining This fresh air would come from an adjoining Room, unconfined space. When ventilating to an Option adjoining unconfined space, you must pro- 3 vide two permanent openings: one within 12" of the ceiling and one within 12" of the floor on
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OWNER’S MANUAL MINIMUM FIREPLACE INSTALLATION WARNING: Never install the CLEARANCE TO heater NOTICE: This heater is intended COMBUSTIBLE MATERIALS • in a bedroom or bathroom un- for use as supplemental heat. less installed as a vented ap- Log Size Side Wall Ceiling Use this heater along with your pliance (see page 10) 18", 24", 16" 42" primary heating system. Do not • in a recreational vehicle and 30" install this heater as your pri- • where curtains, furniture, mary heat source. If you have a
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UNVENTED NATURAL GAS LOG HEATER If Using Mantel if noncombustible material is more than INSTALLATION 12", you may need the hood accessory to You must have noncombustible material(s) Continued deflect heat away from your mantel shelf. above the fireplace opening. Noncombus- See Figure 5 and Figures 6 and 7 on page 9 tible materials (such as slate, marble, tile, NOTICE: Manual control heaters for minimum clearances. etc.) must be at least 1/2 inch thick. With may be used as a vented product. sheet
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OWNER’S MANUAL INSTALLATION Mantel Shelf 10" Underside of Continued 8" Mantel Shelf 6" MANTEL CLEARANCES 1 2 /2" In addition to meeting noncombustible mate- rial clearances, you must also meet required All minimum distances are clearances between fireplace opening and in inches mantel shelf. If you do not meet the clear- Minimum Non- (A) ances listed below, you will need a hood. Combustible Log Set Material 12" 18" 20" 22" 24" 24"/30" Models Determining Minimum Mantel 8" 8" 14" 17" 20" 18" M
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UNVENTED NATURAL GAS LOG HEATER See chart below for minimum permanent INSTALLING HEATER BASE INSTALLATION flue opening you must provide. Attach ASSEMBLY Continued damper clamp so the minimum permanent flue opening will be maintained at all times. INSTALLING DAMPER WARNING: You must secure CLAMP ACCESSORY FOR this heater to fireplace floor. If Chimney Minimum Permanent not, heater will move when you VENTED OPERATION Height (ft.) Flue Opening (sq. ins.) adjust controls. Moving heater 6' to 15' 39
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OWNER’S MANUAL INSTALLATION Continued Heater Gas Regulator Installation Items Needed • hardware package (provided with heater) Fitting • approved flexible gas hose (not provided) Flexible Gas Hose (if allowed by local codes) (if allowed by local codes) • sealant (resistant to propane/LP gas, not provided) • electric drill with 3/16" drill bit (metal Figure 11 - Attaching Flexible Gas Hose to Heater Gas Regulator or masonry as applicable) Masonry Screw • flathead screwdriver 1. Apply pipe joint s
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UNVENTED NATURAL GAS LOG HEATER Installation must include an equipment We recommend that you install a sediment INSTALLATION shutoff valve, union, and plugged 1/8" NPT trap in supply line as shown in Figure 13. Continued tap. Locate NPT tap within reach for test Locate sediment trap where it is within gauge hook up. NPT tap must be upstream reach for cleaning. Install in piping system CONNECTING TO GAS from heater (see Figure 13). between fuel supply and heater. Locate sedi- SUPPLY ment trap whe
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OWNER’S MANUAL Test Pressures Equal To or Less Than Pressure Testing Heater Gas INSTALLATION 1/2 PSIG (3.5 kPa) Connections Continued 1. Close equipment shutoff valve (see Fig- 1. Open equipment shutoff valve (see Fig- ure 14). ure 14). CHECKING GAS 2. Pressurize supply piping system by ei- 2. Open main gas valve located on or near CONNECTIONS ther using compressed air or opening gas meter. main gas valve located on or near gas 3. Make sure control knob of heater is in WARNING: Test all gas pip
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UNVENTED NATURAL GAS LOG HEATER One Piece INSTALLATION Log Set Continued INSTALLING LOGS WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically approved with this heater may result in property damage or personal injury. CAUTION: After installation and periodically thereafter, check to ensure that no flame comes in contact with any log. With the heater set to High, check to see if flames contact any log. If so, re- Burner position logs
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OWNER’S MANUAL 4. Wait five (5) minutes to clear out any LIGHTING OPERATING gas. Then smell for gas, including INSTRUCTIONS HEATER near the floor. If you smell gas, STOP! Follow “B” in the safety in- WARNING: FOR YOUR SAFETY formation in column 1. If you don’t • If fireplace has glass doors, smell gas, go to the next step. READ BEFORE never operate this heater with 5. Slightly depress and turn control LIGHTING glass doors closed. If you oper- knob counterclockwise to C-clockwise ate heater wi
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UNVENTED NATURAL GAS LOG HEATER BURNER PRIMARY AIR OPERATING INSPECTING HOLES HEATER BURNERS Air is drawn into the burner through the Continued Check pilot flame pattern and burner flame holes in the fitting at the burner entrance. patterns often. VARIABLE CONTROL These holes may become blocked with dust or lint. Periodically inspect these holes for OPERATION PILOT FLAME PATTERN any blockage and clean if needed. Blocked The variable control valve can be set to Figure 20 shows a correct pilot fla
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OWNER’S MANUAL TROUBLESHOOTING WARNING: Turn off and un- CAUTION: Never use a wire, plug heater and let cool before needle, or similar object to clean Note: For additional help, visit DESA servicing. Only a qualified ser- ODS/pilot. This can damage ODS/ International’s Technical Service web vice person should service and pilot unit. site at www.desatech.com. repair heater. Note: All troubleshooting items are listed in order of operation. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor butt
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UNVENTED NATURAL GAS LOG HEATER TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Burner does not light after ODS/pilot is lit 1. Inlet gas pressure is too low 1. Contact local natural gas company 2. Burner orifice clogged 2. Clean burner (see Cleaning and Mainte- nance, page 20) or replace burner orifice 3. Burner orifice diameter is too small 3. Replace burner orifice Delayed ignition burner 1. Manifold pressure is too low 1. Contact local natural gas company 2. Burner orifice c
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OWNER’S MANUAL TROUBLESHOOTING Continued WARNING: If you smell gas • Shut off gas supply. • Do not try to light any appliance. • Do not touch any electrical switch; do not use any phone in your building. • Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. • If you cannot reach your gas supplier, call the fire department. IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning supplies, paint, paint remover, cigarette
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UNVENTED NATURAL GAS LOG HEATER 4. Check the injector holder located at the LOGS CLEANING AND end of the burner tube again. Remove • If you remove logs for cleaning, refer to MAINTENANCE any large particles of dust, dirt, lint, or Installing Logs, page 14 to properly re- pet hair with a soft cloth or vacuum place logs. cleaner nozzle. WARNING: Turn off heater • Replace log(s) if broken or chipped 5. Blow air into the primary air holes on and let cool before cleaning. (dime-sized or larger). the
